Sony CPD-G420 (serv.man4) Service Manual ▷ View online
20
Trouble symptoms and remedies
If the problem is caused by the connected computer or other equipment, please refer to the connected equipment’s instruction manual.
Use the self-diagnosis function (page 22) if the following recommendations do not resolve the problem.
Use the self-diagnosis function (page 22) if the following recommendations do not resolve the problem.
Symptom
Check these items
No picture
If the ! (power) indicator is not lit
• Check that the power cord is properly connected.
• Check that the ! (power) switch is in the “on” position.
• Check that the ! (power) switch is in the “on” position.
If the NO SIGNAL message appears
on the screen, or if the
! (power) indicator is orange
on the screen, or if the
! (power) indicator is orange
• Check that the video signal cable is properly connected and all plugs are firmly seated in
their sockets (page 6).
• Check that the INPUT switch setting is correct (page 9).
• Check that the video input connector’s pins are not bent or pushed in.
• Check that the video input connector’s pins are not bent or pushed in.
xProblems caused by the connected computer or other equipment
• The computer is in power saving mode. Try pressing any key on the keyboard or moving
• The computer is in power saving mode. Try pressing any key on the keyboard or moving
the mouse.
• Check that the computer’s power is “on.”
• Check that the graphic board is completely seated in the proper bus slot.
• Check that the graphic board is completely seated in the proper bus slot.
If the OUT OF SCAN RANGE
message appears on the screen
message appears on the screen
xProblems caused by the connected computer or other equipment
• Check that the video frequency range is within that specified for the monitor. If you
• Check that the video frequency range is within that specified for the monitor. If you
replaced an old monitor with this monitor, reconnect the old monitor and adjust the
frequency range to the following.
Horizontal: 30 – 110 kHz
Vertical: 48 – 170 Hz
frequency range to the following.
Horizontal: 30 – 110 kHz
Vertical: 48 – 170 Hz
If no message is displayed and the
! (power) indicator is green or
flashing orange
! (power) indicator is green or
flashing orange
• Use the Self-diagnosis function (page 22).
If using a Macintosh system
• When connecting to a Power Mac G3/G4 that has 3 rows of pins, check that the supplied
exclusive Power Mac G3/G4 adapter and the video signal cable are properly connected
(page 6).
(page 6).
• If you connect to the other version of Macintosh series computer that has 2 rows of pins,
you will need a different adapter (not supplied).
Picture flickers, bounces,
oscillates, or is scrambled
oscillates, or is scrambled
• Isolate and eliminate any potential sources of electric or magnetic fields such as other
monitors, laser printers, fluorescent lighting, televisions, or electric fans.
• Move the monitor away from power lines or place a magnetic shield near the monitor.
• Try plugging the monitor into a different AC outlet, preferably on a different circuit.
• Try turning the monitor 90
• Try plugging the monitor into a different AC outlet, preferably on a different circuit.
• Try turning the monitor 90
° to the left or right.
xProblems caused by the connected computer or other equipment
• Check your graphics board manual for the proper monitor setting.
• Confirm that the graphics mode (VESA, Macintosh 21" Color, etc.) and the frequency of
• Check your graphics board manual for the proper monitor setting.
• Confirm that the graphics mode (VESA, Macintosh 21" Color, etc.) and the frequency of
the input signal are supported by this monitor (Appendix). Even if the frequency is within
the proper range, some graphics boards may have a sync pulse that is too narrow for the
monitor to sync correctly.
the proper range, some graphics boards may have a sync pulse that is too narrow for the
monitor to sync correctly.
• Adjust the computer’s refresh rate (vertical frequency) to obtain the best possible picture.
Picture is fuzzy
• Adjust the contrast and brightness (page 12).
• Degauss the monitor* (page 14).
• Adjust the degree of moire cancellation until the moire is minimal, or set CANCEL
• Degauss the monitor* (page 14).
• Adjust the degree of moire cancellation until the moire is minimal, or set CANCEL
MOIRE to OFF (page 14).
21
GB
* If a second degauss cycle is needed, allow a minimum interval of 20 minutes for the best result. A humming noise may be heard, but this is not a
malfunction.
Picture is ghosting
• Eliminate the use of video cable extensions and/or video switch boxes.
• Check that all plugs are firmly seated in their sockets.
• Check that all plugs are firmly seated in their sockets.
Picture is not centered or sized
properly
properly
• Set the AUTO (
) function to OK (on) in the SIZE/CENTER menu (page 13).
• Adjust the size or centering (page 12). Note that with some input signals and/or graphics
boards the periphery of the screen is not fully utilized.
Edges of the image are curved
• Adjust the geometry (page 13).
Wavy or elliptical pattern (moire)
is visible
is visible
• Adjust the degree of moire cancellation until the moire is minimal (page 14).
xProblems caused by the connected computer or other equipment
• Change your desktop pattern.
• Change your desktop pattern.
Color is not uniform
• Degauss the monitor* (page 14). If you place equipment that generates a magnetic field,
such as a speaker, near the monitor, or if you change the direction the monitor faces, color
may lose uniformity.
may lose uniformity.
White does not look white
• Adjust the color temperature (page 15).
• Check that the 5 BNC connectors are connected in the correct order (page 6).
• Check that the 5 BNC connectors are connected in the correct order (page 6).
Letters and lines show red or blue
shadows at the edges
shadows at the edges
• Adjust the convergence (page 14).
Monitor buttons do not operate
(
(
appears on the screen)
• If the control lock is set to ON, set it to OFF (page 17).
IMAGE RESTORATION function
does not operate
does not operate
• Before using this function, the monitor must be in normal operation mode (green power
indicator on) for at least 30 minutes. For more information on using the IMAGE
RESTORATION function, see page 17.
RESTORATION function, see page 17.
• Adjust the computer’s power saving settings to keep the monitor in normal operation
mode for more than 30 minutes.
• The monitor may gradually lose its ability to perform this function due to the natural aging
of the picture tube.
USB peripherals do not function
• Check that the appropriate USB connectors are securely connected (page 8).
• Check that the ! (power) switch is in the “on” position. Then reconnect the USB cable to
• Check that the ! (power) switch is in the “on” position. Then reconnect the USB cable to
the monitor.
xProblems caused by the connected computer or other equipment
• Check that the power of any self-powered USB compliant peripheral devices is “on.”
• Install the latest version of the device driver on your computer. Contact your device’s
• Check that the power of any self-powered USB compliant peripheral devices is “on.”
• Install the latest version of the device driver on your computer. Contact your device’s
manufacturer for information about the appropriate device driver.
• If your USB compliant keyboard or mouse does not function, connect them directly to
your computer, reboot your computer, and make any necessary adjustments to the USB
settings. Then reconnect the keyboard or mouse to the monitor. If you connect a keyboard
or mouse to the USB connectors and then boot your computer for the first time, the
peripheral devices may not function.
settings. Then reconnect the keyboard or mouse to the monitor. If you connect a keyboard
or mouse to the USB connectors and then boot your computer for the first time, the
peripheral devices may not function.
A hum is heard right after the
power is turned on
power is turned on
• This is the sound of the auto-degauss cycle. When the power is turned on, the monitor is
automatically degaussed for a few seconds.
Symptom
Check these items
I MAGE
RESTORAT I ON
AVA
A F T E R
WARM UP
A F T E R
WARM UP
LABLE
I
MENU
E
COLOR
X I T :
22
Self-diagnosis function
This monitor is equipped with a self-diagnosis function. If there is
a problem with your monitor or computer(s), the screen will go
blank and the ! (power) indicator will either light up green or
flash orange. If the ! (power) indicator is lit in orange, the
computer is in power saving mode. Try pressing any key on the
keyboard or moving the mouse.
a problem with your monitor or computer(s), the screen will go
blank and the ! (power) indicator will either light up green or
flash orange. If the ! (power) indicator is lit in orange, the
computer is in power saving mode. Try pressing any key on the
keyboard or moving the mouse.
x If the ! (power) indicator is green
1
Disconnect any plugs from the video input 1 and 2
connectors, or turn off the connected computer(s).
connectors, or turn off the connected computer(s).
2
Press the ! (power) button twice to turn the monitor
off and then on.
off and then on.
3
Hold the control button upward for 2 seconds
before the monitor enters power saving mode.
before the monitor enters power saving mode.
If all four color bars appear (white, red, green, blue), the monitor
is working properly. Reconnect the video input cables and check
the condition of your computer(s).
is working properly. Reconnect the video input cables and check
the condition of your computer(s).
If the color bars do not appear, there is a potential monitor failure.
Inform your authorized Sony dealer of the monitor’s condition.
Inform your authorized Sony dealer of the monitor’s condition.
x If the ! (power) indicator is flashing orange
Press the ! (power) button twice to turn the monitor off
and then on.
If the ! (power) indicator lights up green, the monitor is working
properly.
and then on.
If the ! (power) indicator lights up green, the monitor is working
properly.
If the ! (power) indicator is still flashing, there is a potential
monitor failure. Count the number of seconds between orange
flashes of the ! (power) indicator and inform your authorized
Sony dealer of the monitor’s condition. Be sure to note the model
name and serial number of your monitor. Also note the make and
model of your computer and graphic board.
monitor failure. Count the number of seconds between orange
flashes of the ! (power) indicator and inform your authorized
Sony dealer of the monitor’s condition. Be sure to note the model
name and serial number of your monitor. Also note the make and
model of your computer and graphic board.
Specifications
CPD-G420
CRT
0.24 mm aperture grille pitch
19 inches measured diagonally
90-degree deflection
FD Trinitron
19 inches measured diagonally
90-degree deflection
FD Trinitron
Viewable image size
Approx. 365
× 274 mm (w/h)
(14
3
/
8
× 10
7
/
8
inches)
18.0" viewing image
Resolution
Maximum
Horizontal: 1920 dots
Vertical: 1440 lines
Vertical: 1440 lines
Recommended
Horizontal: 1280 dots
Vertical: 1024 lines
Vertical: 1024 lines
Input signal levels
Video signal
Analog RGB: 0.700 Vp-p
(positive), 75
(positive), 75
Ω
SYNC signal
H/V separate or composite sync:
TTL 2 k
TTL 2 k
Ω, Polarity free
Sync on Green: 0.3 Vp-p
(negative)
(negative)
Standard image area
Approx. 352
× 264 mm (w/h)
(13
7
/
8
× 10
1
/
2
inches)
or
Approx. 330
Approx. 330
× 264 mm (w/h)
(13
× 10
1
/
2
inches)
Deflection frequency*
Horizontal: 30 to 110 kHz
Vertical: 48 to 170 Hz
Vertical: 48 to 170 Hz
AC input voltage/current 100 to 240 V, 50 – 60 Hz, 2.0 – 1.0 A
Power consumption
Power consumption
Approx. 130 W (with no USB devices
connected)
connected)
Dimensions
Approx. 451
× 471 × 461 mm (w/h/d)
(17
7
/
8
× 18
5
/
8
× 18
1
/
4
inches)
Mass
Approx. 25.5 kg (56 lb 3 oz)
Plug and Play
DDC2B/DDC2Bi, GTF**
Supplied accessories
See page 6
* Recommended horizontal and vertical timing condition
• Horizontal sync width duty should be more than 4.8% of
total horizontal time or 0.8 µs, whichever is larger.
• Horizontal blanking width should be more than 2.3 µsec.
• Vertical blanking width should be more than 450 µsec.
• Vertical blanking width should be more than 450 µsec.
** If the input signal is Generalized Timing Formula (GTF)
compliant, the GTF feature of the monitor will automatically
provide an optimal image for the screen.
provide an optimal image for the screen.
Design and specifications are subject to change without notice.
INPUT
PICTURE EFFECT
MENU
OK
1
2
! (power) indicator
OK
PRINTING THE SERVICE MANUAL
The PDF of this service manual is not designed to be printed from cover to cover. The pages vary in size, and must therefore be printed in sections
based on page dimensions.
based on page dimensions.
NON-SCHEMATIC PAGES
Data that does NOT INCLUDE schematic diagrams are formatted to 8.5 x 11 inches and can be printed on standard letter-size and/or A4-sized paper.
SCHEMATIC DIAGRAMS
The schematic diagram pages are provided in two ways, full size and tiled. The full-sized schematic diagrams are formatted on paper sizes between
8.5” x 11” and 18” x 30” depending upon each individual diagram size. Those diagrams that are LARGER than 11” x 17” in full-size mode have been
tiled for your convience and can be printed on standard 11” x 17” (tabloid-size) paper, and reassembled.
8.5” x 11” and 18” x 30” depending upon each individual diagram size. Those diagrams that are LARGER than 11” x 17” in full-size mode have been
tiled for your convience and can be printed on standard 11” x 17” (tabloid-size) paper, and reassembled.
TO PRINT
FULL SIZE
SCHEMATIC DIAGRAMS
If you have access to a large paper plotter or printer capable of outputting the full-sized diagrams, output as follows:
1) Note the page size(s) of the schematics you want to output as indicated in the middle window at the bottom of the viewing screen.
2) Go to the File menu and select Print Set-up. Choose the printer name and driver for your large format printer. Con fi rm that the printer settings
are set to output the indicated page size or larger.
3) Close the Print Set Up screen and return to the File menu. Select “Print...” Input the page number of the schematic(s) you want to print in the
print range window. Choose OK.
TO PRINT
TILED VERSIO
N OF SCHEMATICS
Schematic pages that are larger than 11” x 17” full-size are provided in a 11” x 17” printable tiled format near the end of the document. These can be
printed to tabloid-sized paper and assembled to full-size for easy viewing.
printed to tabloid-sized paper and assembled to full-size for easy viewing.
If you have access to a printer capable of outputting the tabloid size (11” x 17”) paper, then output the tiled version of the diagram as follows:
1) Note the page number(s) of the schematics you want to output as indicated in the middle window at the bottom of the viewing screen.
2) Go to the File menu and select Print Set-up. Choose the printer name and driver for your printer. Con fi rm that the plotter settings are set to output
11” x 17”, or tabloid size paper in landscape (
) mode.
3) Close the Print Set Up screen and return to the File menu. Select “Print...” Input the page number of the schematic(s) you want to print in the
print range window. Choose OK.
TO PRINT
SPECIFIC SECTIONS
OF A SCHEMATIC
To print just a particular section of a PDF, rather than a full page, access the Graphics Select tool in the Acrobat Reader tool bar.
1) To view the Graphics Select Tool, press and HOLD the mouse button over the Text Select Tool which looks like:
This tool will expand to reveal to additional tools.
Choose the Graphics Select tool by placing the cursor over the button on of the far right that looks like:
Choose the Graphics Select tool by placing the cursor over the button on of the far right that looks like:
2) After selecting the Graphics Select Tool, place your cursor in the document window and the cursor will change to a plus (+) symbol. Click and
drag the cursor over the area you want to print. When you release the mouse button, a marquee (or dotted lined box) will be displayed outlining
the area you selected.
the area you selected.
3) With the marquee in place, go to the fi le menu and select the “Print...” option. When the print window appears, choose the option under the section
called “Print Range” which says “Selected Graphic”.
Select OK and the output will print only the area that you outlined with the marquee.
(continued
>)
T
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